TWM625640U - Gas-phase powder grading equipment - Google Patents

Abstract

The new model relates to a gas phase powder classification equipment, comprising a feeding hopper, a dispersing single cone and a grading chamber arranged below the discharge port of the feeder, the grading chamber includes an upper cone chamber and a lower cone chamber, and the feeding hopper is arranged at the bottom of the grading chamber. At the feeding port at the top, the dispersing single cone is set in the grading chamber and below the feeding port of the grading chamber. The grading chamber is provided with a dispersing cone disc and an air inlet ring, and the air inlet ring is installed in the upper cone chamber and the lower cone chamber. At the junction of the grading chamber, the side wall of the lower cone chamber of the grading chamber is provided with a penetrating draft pipe, and the bottom of the grading chamber is provided with a coarse powder discharge valve and a coarse powder collection bucket. The present application enhances the separation of large and small particles, and improves classification efficiency and classification accuracy.

Description

Gas phase powder classification equipment

The new model relates to ultrafine powder classification equipment, which belongs to the technical field of nanoscale, submicron, and micron ultrafine powder gas-phase classification.

Among the known powder phase separation method classification equipment, a centrifugal cyclone is more common. During the classification process of the centrifugal cyclone separator, after the powder enters the cyclone body under the action of the airflow, a downward movement outer circulation is formed on the outside of the cyclone body due to the action of gravity and centrifugal force, and the large particle powder moves downward along the cyclone body wall. Meal collection bucket. An upward moving inner circulation is formed in the center of the cyclone body, and the small particle powder moves upward along the center of the cyclone body into the fine powder collection tank, so as to achieve the purpose of classifying different particles. However, in a general cyclone classifier, the rotating speed of the powder in the cyclone body is slow, and the centrifugal force on the powder is weak, resulting in low classification efficiency and poor classification accuracy.

Aiming at the problems existing in the above classification equipment, the present invention provides a gas-phase powder classification equipment with high efficiency and high precision, which is easy to operate and can better handle nanoscale, submicron and micron ultrafine powder classification.

The novel technology of the present invention provides a gas-phase powder classification equipment, including a feeding hopper, a dispersing single cone and a classification chamber arranged below the discharge port of the feeder, and the classification chamber includes an upper cone chamber and a lower cone chamber, so the The feeding hopper is set at the feed port at the top of the grading chamber, the dispersing single cone is set in the grading chamber and below the feeding port of the grading chamber, and the middle of the grading chamber is provided with a dispersing cone disc and an air inlet ring , the air inlet ring is installed at the connection between the upper cone chamber and the lower cone chamber, and the side wall of the lower cone chamber of the grading chamber is provided with a through air induction pipe, and one end of the air induction pipe is from bottom to After passing through the central hole of the air inlet ring, it is connected to the dispersing cone. The other end of the air induction pipe extends to the cyclone separator outside the classification room, and the other end of the cyclone separator is connected with a collection tank. The classification chamber There is a coarse powder discharge valve and a coarse powder collection bucket at the bottom of the machine.

Optionally, the dispersing single cone is in the shape of a cone with a small top and a large bottom, and the projected bottom extending downward along the cone surface covers the center hole of the dispersing cone, and the diameter of the bottom of the dispersing single cone is the same as the diameter of the center hole of the dispersing cone. The diameter ratio is 1:0.5 to 1:4.

Optionally, the distance between the bottom of the single dispersion cone and the dispersion cone disk is 1 to 50 cm.

Optionally, the dispersion cone is in the shape of a truncated cone with a small upper part and a large lower part, and is concentrically arranged in the central hole of the air inlet ring.

Optionally, the dispersion cone is sleeved at the top position of the air induction pipe.

Optionally, the upper cone chamber of the classification chamber is in the shape of a truncated cone with a small upper part and a large lower part, and the lower cone chamber is in the shape of a truncated cone with a large upper part and a small lower part.

Optionally, the air intake ring is provided with a plurality of air intake holes, and the air intake holes extend from the outer side of the air intake ring to the inner side surface of the air intake ring.

Optionally, the inner wall of the air inlet ring and the upper conical chamber of the grading chamber or the inner diameter of the inner wall of the air inlet ring is larger than the inner diameter of the bottom of the upper conical chamber, and the lower conical chamber of the grading chamber. The inner diameter of the top is greater than or equal to the inner diameter of the inlet ring to prevent falling powder from depositing on the step table at the connection.

Optionally, the angle between the air intake direction and the tangential direction of the air intake hole of the air intake ring is 3 to 30°, and the top view shape of the air intake hole is a circular ring, a rectangle, a trapezoid and a circular arc. at least one of them.

Optionally, a valve is provided between the cyclone separator and the collection tank, and the number of the cyclone separator is 1 to 3.

Compared with the prior art, the present invention has the following advantages:

In this design, a conical grading chamber and a porous air intake ring are used for air intake. Each time the cyclone passes through an air intake hole, it undergoes a rotational acceleration process. At the same time, the flow velocity of the carrier cyclone is prevented from decreasing when it rotates and turns, and the rotation speed of the airflow is continuously maintained and increased. After the powder enters the classification chamber and passes through the dispersing single cone, the high-speed rotating airflow improves the powder dispersion and centrifugal force, and increases the separation of large and small particles, thereby improving the classification efficiency and classification accuracy. Under the action of gravity and centrifugal force, it directly enters the coarse powder collection bucket along the cone wall of the classification chamber, and the small particle powder enters the cyclone separator with the carrier gas through the draft pipe for further classification, and the large particle powder after reclassification enters the cyclone separation. The coarse powder collection bucket at the bottom of the cyclone separator, and the fine powder enters the fine powder collection tank from the top of the cyclone separator. In addition, the porous air intake rings with different sizes and shapes of air intake holes can also be replaced to adjust the size and direction of the air intake to meet the classification requirements of different powders. It can also be achieved by increasing or decreasing the number of cyclones. Different classification accuracy requirements for powders.

The present invention will be further described below in conjunction with the schematic structural diagram.

As shown in Figure 1, the new gas phase powder classification equipment includes a feeding hopper 2, a dispersing single cone 3 and a classification chamber arranged below the discharge port of the feeder 1, and the feeding hopper 2 is arranged at the top of the classification chamber. At the feed port, the dispersing single cone 3 is arranged in the grading chamber and below the feed port of the grading chamber, and a dispersing cone disc 5 and an air inlet ring 6 are arranged in the middle of the interior of the grading chamber. There are several air inlet holes on the side, the side wall of the air inlet ring 6 is in close contact with the inner wall of the upper and lower grading chambers, the lower conical wall of the grading chamber is provided with an air induction pipe 7, and one end of the air induction pipe 7 is Passing through the central hole of the air inlet ring 6 from bottom to top, the other end of the air induction pipe 7 extends to the cyclone separator 10 outside the classification room, and the other end of the cyclone separator 10 is connected to a collection tank (not shown in the figure) , the bottom of the classification chamber is provided with a coarse powder discharge valve 8 and a coarse powder collection barrel 9.

The dispersing single cone 3 is in the shape of a cone with a small top and a large bottom, and the projected bottom extending downward along the cone surface covers the center hole of the dispersing cone 5. The bottom diameter of the dispersing single cone 3 is the same as the center hole of the dispersing cone 5. The diameter ratio is 1:0.5 to 1:4, and the distance between the bottom of the single dispersion cone 3 and the dispersion cone disk 5 is 1 to 50 cm.

The dispersion cone 5 is in the shape of a circular truncated cone with a small upper part and a large lower part, and is placed in the center hole of the air inlet ring 6 and arranged coaxially with the center hole of the air inlet ring 6. at the top position.

The grading chamber is composed of two parts, the upper cone chamber 4.1 in the upper part and the truncated cone in the upper part and the lower cone chamber 4.2 in the lower part. 6 is installed at the connection between the upper cone chamber 4.1 and the lower cone chamber 4.2.

As shown in FIG. 2 , the angle between the air intake direction and the tangential direction of the air inlet holes of the air inlet ring 6 is 3 to 30°, and the top view of the air inlet holes has an arc-shaped inlet with a large outer and a small inner according to actual requirements. Air holes 6.1, rectangular air inlet holes 6.2, concentric arc air inlet holes 6.3, parallel arc air inlet holes 6.4 or trapezoidal air inlet holes 6.5 large outside and small inside.

A valve is provided between the cyclone separator 10 and the collection tank, and the cyclone separator 10 can be increased by 1 to 3 as required.

A coarse powder discharge valve 8 is arranged between the classification chamber and the coarse powder collection barrel 9 .

Under the action of the induced draft fan (not shown in the figure), the powder enters the grading chamber through the dispersing single cone 3 through the feeding hopper 2 for high-speed rotation. Under the action of gravity and centrifugal force, the large particles enter the coarse powder along the inner wall of the grading chamber Collecting bucket 9, the fine particles are concentrated in the center of the classification chamber and enter the cyclone 10 through the draft pipe 7 and the cyclone tangential inlet pipe 10.1, and the fine powder is separated by the cyclone 10 from the cyclone. The air outlet pipe 10.2 enters the collection tank, and the coarse powder is separated by the cyclone separator 10 and then enters the coarse powder collection bucket 10.3 of the cyclone separator, so as to achieve the purpose of classification.

The new type can adjust the size and direction of the air intake by replacing the porous air intake ring 6 with different air intake holes of different sizes to meet the classification requirements of different powders, and can also increase or decrease the number of cyclones 10 to adjust Meet different classification accuracy requirements of different powders.

The new model adopts a conical grading chamber and a porous air intake ring 6 for air intake, which reduces the resistance of the airflow after entering the cyclone body and increases the rotation speed of the airflow. After the powder enters the classification chamber and passes through the dispersing single cone 3, the high-speed rotating airflow improves the powder's dispersibility and centrifugal force, and increases the separation of large and small particles, thereby improving the classification efficiency and classification accuracy. The fine powder enters the cyclone separator 10 through the air induction pipe 7 and is classified again, so that the classification accuracy of the powder can be effectively guaranteed. Compared with the traditional single classifier or cyclone separator, the new gas-phase powder classification equipment has a great improvement in the classification efficiency and classification accuracy of powder, and is suitable for rice-resistant, sub-micron, Precision grading of micron-sized ultrafine powders.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art , without departing from the technical scope of the present invention, when the technical content disclosed above can be used to make some changes or modifications to equivalent embodiments of equivalent changes, provided that it does not depart from the technical content of the present invention, the technical essence of the present invention is based on the above. Any simple modifications, equivalent changes and modifications made in the embodiments still fall within the scope of the present novel technology.

1: Feeder 2: feed hopper 3: Dispersed single cone 4.1: Upper cone chamber 4.2: Lower cone chamber 5: Dispersion cone 6: Intake ring 7: Induction duct 8: Coarse powder discharge valve 9: coarse powder collection bucket 10: Cyclone separator 10.1: Cyclone tangential inlet pipe 10.2: Cyclone separator fine powder outlet pipe 10.3: Cyclone Separator Coarse Powder Collection Bucket 6.1: Arc-shaped air intake holes with large outside and small inside 6.2: Rectangular air intake 6.3: Concentric arc air intake 6.4: Parallel arc air intake 6.5: Trapezoidal air intake holes with large outside and small inside

FIG. 1 is a schematic structural diagram of an embodiment of a novel gas phase powder classification equipment.

FIG. 2 is a schematic structural diagram of an embodiment of a novel air intake ring.

1: Feeder

2: feed hopper

3: Dispersed single cone

4.1: Upper cone chamber

4.2: Lower cone chamber

5: Dispersion cone

6: Intake ring

7: Induction duct

8: Coarse powder discharge valve

9: coarse powder collection bucket

10: Cyclone separator

10.1: Cyclone tangential inlet pipe

10.2: Cyclone separator fine powder outlet pipe

10.3: Cyclone Separator Coarse Powder Collection Bucket

Claims (10)

A gas phase powder grading equipment, comprising a feeding hopper, a dispersing single cone and a grading chamber arranged below the discharge port of the feeder, the grading chamber includes an upper cone chamber and a lower cone chamber, the feeding hopper is located in the At the feed port at the top of the grading chamber, the dispersing single cone is arranged in the grading chamber and below the feed port of the grading chamber. At the connection between the upper cone chamber and the lower cone chamber, a through air induction pipe is arranged on the side wall of the lower cone chamber of the grading chamber, and one end of the air induction pipe passes through the air inlet ring from bottom to top. The center hole is connected with the dispersing cone, the other end of the draft pipe extends to a cyclone separator outside the classification chamber, the other end of the cyclone separator is connected with a collection tank, and the bottom of the classification chamber is provided with a coarse powder discharger. feed valve and coarse powder collection bucket. The gas-phase powder classification equipment according to claim 1, wherein the dispersing single cone is in the shape of a cone with a small top and a large bottom, and the projected bottom extending downward along the conical surface covers the center hole of the dispersing cone, and the diameter of the bottom of the dispersing single cone is The ratio of the diameter to the central hole of the dispersion cone is 1:0.5 to 1:4. The gas-phase powder classification equipment according to claim 1 or 2, wherein the distance between the bottom of the dispersing single cone and the dispersing cone disk is 1 to 50 cm. The gas-phase powder classification equipment according to claim 1, wherein the dispersing cone is in the shape of a truncated cone with a small upper part and a large lower part, and is concentrically arranged in the central hole of the air inlet ring. The gas-phase powder classification equipment according to claim 1 or 4, wherein the dispersing cone is sleeved at the top position of the draft pipe. The gas-phase powder classification equipment of claim 1, wherein the upper cone chamber of the classification chamber is in the shape of a truncated cone with a small upper part and a large lower part, and the lower cone chamber is in the shape of a truncated cone with a large upper part and a small lower part. The gas-phase powder classifying equipment according to claim 1, wherein the inlet ring is provided with a plurality of inlet holes, and the inlet holes extend from the outer side of the inlet ring to the inner side of the inlet ring. The gas-phase powder classification equipment according to claim 1 or 7, wherein the inner diameter of the inner wall of the inlet ring and the upper cone chamber of the classification chamber is larger than the inner diameter of the bottom of the upper cone chamber, and the lower part of the classification chamber The inner diameter of the top of the cone chamber is greater than or equal to the inner diameter of the inlet ring. The gas-phase powder classification equipment of claim 7, wherein the angle between the air intake direction and the tangential direction of the air inlet hole of the air inlet ring is 3 to 30°, and the top view shape of the air inlet hole is a circular ring, At least one of a rectangle, a trapezoid and a circular arc. The gas phase powder classification equipment according to claim 1, wherein a valve is provided between the cyclone separator and the collection tank, and the number of the cyclone separators is 1 to 3.

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